Evidence for the Exchange Effect Down to Very Low Energy in the Beta Decays of \(63}\) Ni and \(241}\) Pu

Metallic magnetic calorimeters have been used for several years for the determination of the shapes of beta spectra. Experimental spectra of the beta decays of \(63}\) Ni and \(241}\) Pu exhibit, at very low energy, strong deviations from standard theoretical calculations including corrections for s...

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Published inJournal of low temperature physics Vol. 176; no. 5; pp. 1040 - 1045
Main Authors Loidl, M, Le-Bret, C, Rodrigues, M, Mougeot, X
Format Journal Article
LanguageEnglish
Published Springer Verlag (Germany) 01.09.2014
Subjects
Beta decay
Deviation
Engineering Sciences
Exchange
Low energy
Mathematical analysis
Nickel
Nuclear Experiment
Physics
Plutonium
Signal and Image processing
Spectra
ionizing radiations
beta spectrum
Metallic magnetic calorimeters
beta decay
atomic exchange
metrology
Exchange effect
Beta spectrometry
nuclear size
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Summary:Metallic magnetic calorimeters have been used for several years for the determination of the shapes of beta spectra. Experimental spectra of the beta decays of \(63}\) Ni and \(241}\) Pu exhibit, at very low energy, strong deviations from standard theoretical calculations including corrections for screening, radiative, and nuclear size effects. These discrepancies can be attributed to the atomic exchange effect. In particular the spectrum of \(63}\) Ni measured with an electroplated \(63}\) Ni source is in excellent agreement with theory including the exchange effect. This underlines the quality of the experimental spectrum as well as the correctness of the calculation of the exchange effect.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-014-1190-9